Apparatus for making plate glass



July 28, 1931. F. GELSTHARP 1,815,972

v APPARATUS FOR MAKING PLATE GLASS Filed Jan. 1'7. 1928 2 Sheets-Sheet l I INVENTOR July 28, 1931. F. GELSTHARP APPARATUS FOR MAKING PLATE GLASS Filed Jan. 17, 1928 2 Sheets-Sheet 2 the function above set forth; the provision Patented July.2 8 1931 nnnnnitroxlentsrnsnr, or nmet; rnlvnsyLvAivra, essrenoie 'IO'PITTSBUBGH MPLATE' GLASS fcoMrANY, A ORP ATION-or,rEnNsYLvANIA instants'ros axmer m GLAss of improved means foif'positioning therolls in with respect to 'thebath; and the provision of an arrangementfinwhich the tendency to the formation of mechanical ream isreducedi One embodiment of the invention is 'illustrated in the accompanyingdrawings, Where- ,-Figure;1 is a verticalisection on'the line I-I of 'Fig;" 2."--An,d Fig. 2 is'a'horizontal'v 'sec'tionon the line. ofFig'. 1. I v

Referring to the drawings, 1 {is a draw- I ing tanl rorforehea-rth communicating with a meltingtank,preferably of the regenerator type; "2 and 3. are driven water cooled rolls for continuously withdrawing the glass sheet 7 e 4 from the' bath'in the'forehearth; -5 -isa run- "way made up ofthe rolls 6, 6'," 6, etc. for re ceivingthe glass and 'conducting it into the 1 roller leer 7 'and 8 is atruck or carriage mounted upon the track 9and supporting the sizing rolls '2 and 13, and the runway 5. Adyacent'theend wall-10 of the forehearth, such forehearthopensupwardly and in this .opening is located thesizing roll 3, the remainder of the upper surface of the bath in the forehearth being closed by means of the cover plate 11, which is supported above for ready removal by. means of the chains 12. A water cooled gate .13 is preferably employed forcutting off the supplyof glassto the fore hearth when it becomes necessary to make repairs onthe forehearth or when'for any reason it becomes desirable, to cut off a communication between the drawing tank and the melting tanlLg'A' cover-1 1 of refractory qmaterial is preferablyemployed above the vsizing'rolls and runway in order to maintain the proper temperature in the space traversed by the glass sheeton its way to the leer, such cover being also supported for ready removal @by means of the chains and rods and v16.

5- The framework 17 f'offthe truck carries a p pair of arms 19, 19 pivoted to the framework' 17 for swinging movement about the axis of rotation20, such arms being pivoted upon suitable. pivots 21, 21 (Fig. 2). These arms are provided with bearings which carry the ro11s6, 6, 6, etc. constituting the runway, and also carry theaXle 22- of the sizing roll. 2.

The sizing roll 3 "is carried by another pair ofarms 23,23 pivoted uponthe axle 22 of the roll 2, so that the roll 31nay be adjusted verticallyrwith respect'to the axis of rotation of the r0112 to adjust the degree ofimmersion of the roll 3 in the glass bath. The arms 23, 23 are extended to the rear, as indicated in Fig. 1, and are pivoted at their ends to [the vertical threaded rods 24, 24.] These'rods extend through nuts, carried by the worm m: us

wheels 25, 25 mounted in the brackets, 26, 26

carriedbythe frame of the truck. The worm;

wheels 25, 25 are rotated by meansofworms carriedupon the transverse sh'aft27 and this I transverse shaft 27 is provided at its end with 1 a crank'28 2),. Provision is made in this way for swinging theroll 3 up and down fto'suitrequirements. The arms 19, 19 which: 'carrythe vrunwayrolls 6, 6, 6 and; the sizing roll2'are adjusted-up and down by means'of thelthreaded rods .28, 28 which extend" These worm wheels are carried in brackets through nuts in the worm Wheels ,29, 29.

30, 30-and are adapted to berotated by suit: T

able wormson the shaft '31. Thisshaft exe I I tends laterally,-as indicated in Fig. 2, and is provided at'its endwith a crank32 for rotating it and thusgraising and lowering the arms 19, 19 This ad3ustmg dev cecomes into play when it becomes necessary to remov th T paratus from "thel'tank, at which time the shaft 31 isrotat e'dfso as to cause the raising '9 90 I runwayfandthe sizjingrolls, thismovementj of the arms19, 19 carrying with themthe;

track 9' to one side 'of the tank. I

I The rolls 6, 6, 60f the runway and thesizing 1 rolls 2, pm driven from the sha ft 33 shown in'Fig;'2,such shaft being in turn driven from the leer drive'shaft 34 through the intermed-i too ary of the bevel gears 35. The shaft 33 is provided with a sprocket having the sprocket chain 36 and such sprocket is splined on the shaft 33, so that the drive of the sprocket chain 36 may be "continued regardless of the lateral position of the truck 8: upon its track. 7 The sprocket chain. 36i drivest a shaft.

I 37 which has as its vaxis of rotation the line .20 (Fig. 1) and this shaft 37 and the shafts 22 of the'roll 2.- Therol'ls .2 andf3l have at their ends the intermeshing spur gears 42,. jsthe driveof the sizing rolls: being; in'this mannertprovid'ed' for in: any and allipo'sitionsof adjustment The shafts 37xfifllb39l and i the truck as unit, the only fixed part of'the of th e rolls 6', 6,6 are provided witlisprockets around whiclr: pass the sprocketchains 3 8';

38,'so' that the rolls 6, 6, 6 are driven from. the shaft 37. The shaft'37'als'o" drives'the' countershaft 39 through-the intermediary'of the bevel gears 40, and this countershaft 39 has-iat'itsend a beveled gear 40. in driving engagement with t-he bevel gear 41 on the shaft thedriwing mechaznism, as indicated in Fig. 2, are supported by suitable" sprockets car'- tried by the framework of the truck 8, and the:

arnrl9 'so'thati all of these parts move with driving. mechanism being; the shaft 3 3 here-:

1 toforereferredito, uponwlriehthe sprocket which drives the chain is splined.

- The arrangement-of the roll 2 above-the .endvwallxli) of the tank serves to reducethe I amount of: contact between" the glass bath and'suchi rollian d r'e'du'ces'the tendency to" fomn mechanical ream, which tendency is present where a chilled metal roll contacts:

with a body of mol'ten':glass. Therrolls-are" water cooled*-by"the use ofthe swivels 43 located at both ends thereof, to which are fcoiiii'e'cted'tlie supply: pipes: 443. When-xit is I desiredto start the operation, the partsare is positioned, asin'dicated -in"Fig. hand-the.

rotation ofthe. sizing rolls: is started-,1 the glass sheet which is started in this manner bein'gturned laterally over'the'rolli 2', as it emer eswhich-tm'nin' o eration: can be erformed by an operator with a barn After the sheet 1 has once been started, it continues in this path of movementL Whenit'is; desired'to discontinue the operation, the crank V 32 is operatedtdsecur'e the upward movementof the threaded rods28 an'dfof'the' run- 7 .way and sizing rolls, the sheet process of. 'form'a'tion being pulled apart below the 'siz-' ing. rolls" after they havebeen lifted aesh ort' distance above: the glass;- This separation of theglass may also be facilitated by running the rolls atan: increased' rate; ofgspeed." For,

simplicity inillustration no sh-owin-gis included of the devicesatthee'n'dsof therolls known'as guns, similart'o -the members 4 4 of my reissue :patent heretofore referred to, I but: it wilhbe understood that such devices 1 otherauxili aryz device's; commonly used ing located intheopening above the bath,

andhavingits peripherycontacting with the bath,andtheot'herof said rolls lying above said end-wall of-thetank, means for cooling the rolls so as to prevent the glass from sticking thereto, and a-glass-recei-ving bed :or'r'unway extendinglaterallyat one side of the rol-lsfor carrying away the glass-which is formed between the rolls: and delivered up- .ward therebyt- I r 2. In combination, a glass tankcontaining a: body" of; molten" glass and. open above the bathadjacenti theend' wall-of the tank a pair of.horizontalqdriven sizing rolls arranged'side by sidewith their center lines above the levelv oftheiiglas's, Zone of such rolls being; lo'cated in-the opening above the bath-, -v

and having its periphery contacting' with the bath: and the other ofsaid rolls lying above said end wall of the tank, means for cooling; the rolls so as to preventthev glass from sticking thereto: a'glass receiving bed onrunway extendinglaterallyat one side of the roll located above the; end wall, means whereby the runway and rolls may be; moved vertically as a-uilitnnd means whereby the rollengaging the glass 1 bath; may be swung vertically;v around the axis of rotation of the other roll I to regulate Bits; degree ofi-mmer- 'sion inthebathm .v

Intestimony whereoffl have hereunto subscribed myname this 9thday ofJanuary, 1928." V

FR DERIGKQGELSTHARP. 

